4
described in platform coordinates.) The next step in the process, referred to in Figure 2 as
"Advanced Processing" converts the calibrated DN's into physically related quantities such as
reflectance, emittance etc. and places these in a geographic coordinate system (i.e. they are
geocoded). By placing calibrated physical measurements in a geographic coordinate system we
achieve two objectives: 1)The use of a common coordinate system which is independent of the
particular geometry of the acquiring spacecraft allows measurements from various sources to be
combined and compared, and 2) the use of a common geographic coordinate system permits
easy integration of the measurements with other map-referenced data which is already in the
same coordinate system.
Climate Forestry ••••••••
Operational Users
Oceans
etc.
J
Figure 2 Information Delivery System
